The more an engine is driven, the more carbon deposits can build up on fuel injectors, intake valves and ports. Gumout® High Mileage Fuel Injector Cleaner is specially formulated to remove carbon deposits from engines with over 75,000 miles for restored engine performance and fuel economy. Learn more about the science behind Gumout.
Specially formulated for vehicles over 75,000 miles. Oxygen sensor safe. Safe for use in turbocharged and supercharged vehicles. Will not void OEM/manufacturer’s warranty. Add entire bottle to nearly empty gasoline tank, then fill tank with up to 21 gallons of gasoline. For best results, do not refill tank until near empty. Use every 3,000 miles.